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Avoid mkfs options conflict, use minimal mkfs options to create loopfs.
Merge of master-melb:xfs-cmds:29028a by kenmcd.

#! /bin/sh
# FS QA Test No. 049
#
# XFS on loop test
#
#-----------------------------------------------------------------------
# Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
#-----------------------------------------------------------------------
#
# creator
owner=dxm@sgi.com

seq=`basename $0`
echo "QA output created by $seq"

_cleanup()
{
    cd /
    umount $SCRATCH_MNT/test2 > /dev/null 2>&1
    umount $SCRATCH_MNT/test > /dev/null 2>&1
    rm -f $tmp.*

    if [ -w $seq.full ]
    then
        echo "--- mounts at end (after cleanup)" >> $seq.full
        mount >> $seq.full
    fi
}

here=`pwd`
tmp=/tmp/$$
status=1	# failure is the default!
trap "_cleanup ; exit \$status" 0 1 2 3 15

# get standard environment, filters and checks
. ./common.rc
. ./common.filter

# real QA test starts here
_supported_fs xfs
_supported_os Linux

_log()
{
    echo "--- $*"
    echo "--- $*" >> $seq.full
}

_require_nobigloopfs
_require_nonexternal
_require_scratch
_require_loop

rm -f $seq.full

echo "(dev=$SCRATCH_DEV, mount=$SCRATCH_MNT)" >> $seq.full
echo "" >> $seq.full

echo "--- mounts" >> $seq.full
mount >> $seq.full

_log "Create ext2 fs on scratch"
mkfs -t ext2 $SCRATCH_DEV >> $seq.full 2>&1 \
    || _fail "!!! failed to mkfs ext2"

_log "Mount ext2 fs on scratch"
mount -t ext2 $SCRATCH_DEV $SCRATCH_MNT >> $seq.full 2>&1 \
    || _fail "!!! failed to mount"

_log "Create xfs fs in file on scratch"
/sbin/mkfs.xfs -f -dfile,name=$SCRATCH_MNT/test.xfs,size=40m \
    >> $seq.full 2>&1 \
    || _fail "!!! failed to mkfs xfs"

_log "Make mount points"
mkdir $SCRATCH_MNT/test $SCRATCH_MNT/test2 >> $seq.full 2>&1 \
    || _fail "!!! failed to make mount points"

_log "Mount xfs via loop"
mount -t xfs -o loop $SCRATCH_MNT/test.xfs $SCRATCH_MNT/test >> $seq.full 2>&1 \
    || _fail "!!! failed to loop mount xfs"

_log "stress"
$FSSTRESS_PROG -d $SCRATCH_MNT/test -n 1000 $FSSTRESS_AVOID >> $seq.full 2>&1 \
    || _fail "!!! stress failed"

_log "clean"
rm -rf $SCRATCH_MNT/test/* >> $seq.full 2>&1 \
    || _fail "!!! clean failed"

_log "create file for ext2 fs"
dd if=/dev/zero of=$SCRATCH_MNT/test/test.ext2 bs=1024 count=10240 >> $seq.full 2>&1 \
    || _fail "!!! create file failed"

_log "Create ext2 fs in file on looped xfs"
echo y | mkfs -t ext2 $SCRATCH_MNT/test/test.ext2 >> $seq.full 2>&1 \
    || _fail "!!! failed to mkfs ext2 on xfs"

_log "Mount ext2 on xfs via loop"
mount -t ext2 -o loop $SCRATCH_MNT/test/test.ext2 $SCRATCH_MNT/test2 >> $seq.full 2>&1 \
    || _fail "!!! failed to loop mount xfs"

_log "stress ext2 on xfs via loop"
$FSSTRESS_PROG -d $SCRATCH_MNT/test2 -n 1000 $FSSTRESS_AVOID >> $seq.full 2>&1 \
    || _fail "!!! stress ext2 failed"

_log "clean"
rm -rf $SCRATCH_MNT/test/* >> $seq.full 2>&1 \
    || _fail "!!! clean failed"

_log "umount ext2 on xfs"
umount $SCRATCH_MNT/test2 >> $seq.full 2>&1 \
    || _fail "!!! umount ext2 failed"

_log "umount xfs"
umount $SCRATCH_MNT/test >> $seq.full 2>&1 \
    || _fail "!!! umount xfs failed"

echo "--- mounts at end (before cleanup)" >> $seq.full
mount >> $seq.full

rm -f $seq.full
# success, all done
status=0
exit